Towel rack adaptor shelf



FIG. 1 is a top perspective view of a towel rack adaptor shelf showing my new design;

FIG. 2 is a front elevational view of the shelf;

FIG. 3 is a rear elevational view of the shelf;

FIG. 4 is a right side elevational view thereof, the undisclosed left side being a mirror image;

FIG. 5 is a top plan view of the shelf; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a towel rack adaptor shelf, as shown and described. 